Reserve dyeing on vegetable fibers



Patented u 1, 1928.

UNITE STATES PATENT- OFFICE.

HANS LEEIANN, OI BOTTKDIGEEIUHLE-BINNINGEN,NEAR BASIL AND GIOVANNI TAGLIANI, O1 BASED, SWITZERLAND, ABSIGNOBB, BY IESNE ASSIGNMENTS, TO KUNITEX CORPORATION, 01' LODI, NEW JERSEY, A CORPORATION 01 NEW JERSEY.

, usanvnnramo on vnearaann means.

In Drawing. Original application illed April 27, 1825, Serial No. 26,289, and in Germany I Iay 7, 192A. Divided and thir application illed Kay 20, 1886. Serial No. 110,538.

This ap lication is divisional of application Ser. 0. 26,289.

The hitherto known reserve processes consist of, mechanical or chemical operations. a To the first type belongs the binding and the covering of the vegetable fibers (yarns and fabrics) b substances insoluble in water so that the estufis employed can only soak in and be ed on the unbound or uncovered arts of the fabric. To the second class longs the application of certain agents, referably of salts, which react chemlcally uring the dyeing or during the development of the dyes. All these rocesses depend, however, on certain conditions. If the reserve agents employed are. removed during the dyeing process or during the develop ment of the dyes, or if the do not these operations until the en of the dyeing, so then the desired reserve effect does not occur and the fabric is dyed uniformly throughout as if the reserving agents had not been used at all.

It is known from German specification No. :5 346,883 and others, that it is possible to render vegetable fibers (yarns, loose material, fabrics) com letelyimmune against substantive dyestu sv by treating them after alkalinization with solutions of aromat1c carao box lic acid chlorides or aromatic sulpho aci chlorides. Both the alkalinization and the action of the aromatic acid or sulpho-acid chlorides are so effected that the whole of the vegetable fibers is brought into the soluu tions of the respective agents. g

It has now been shown in a surprising manner that this esterification can also used for'the topical alteration of the vegetable fibers, in view of the production ofre- 4o serve effects, for example, in a suitable printing process. It was not at allto be foreseen from the more active treatment in solution that the short superficial and sparing local treatment, as it takes place for example in 4.5 the printin process, would suflice to produce the desir esterification. This process affords permanently reserving patterns with unexpected dyeing properties, which remain fast even after hot was ing operations, after hot neutral. acid or alkaline dye baths.

' The uction of such reserve efiects is now utilized in the process for reserve dye ing on vegetable fibers forming the subject of the present invention. This process consists in first treating topically the vegetable fibers by a local printin with a suitable alkalizing agent, such as or example a concentrated alkaline solution, with or without thickening agent, with or without the addition of alcohol, with or without an alcoholic solution of an alkali alooholate, then in applyin thereon in dry or moist condition, an ester'i ying aromatic acid chloride, such as an aromatic carbo lic acid chloride,or an aromatic sulpho aci chloride, in pure or dissolved condition, and finally after the resulting esterification' in thorou hly washing the vegetable fibers being thus locally altered at the places of the aforesaid print, toconstitute what is commonly termed as reserve efi'ects. Thereupon .the fibers can be dyed, without the locally altered esterified places taking up the dye, so that the appear white on a colored ground. But, it as been found that before dyeing theunaltered ve etable fibers, it can be advanta us to ye the reserve efiects produced y the saidlocal esterification on' the fiber, with basic dyestufls or with gallocyanine derivatives, so that they a ar colored on a white ground. The :vegeta e=fibers thus previously dyed can then be subsequently dyed with substantive d estufis on the unaltered parts, or the proc ure can be carried out in the reserve way taking into consideration 'therelative' power of precipitation of. the-various dyestufis used.

As dyestuffs, there ma be used in all above operations the usu coloringmatters which are suitable for carrying out the improved processes. The fibers may be in form .of loose material, yarns or fabrics.

What we claim is:

1. .A process for reserve dyeing on vegetable fibers, which consists in treating topically the vegetable .fibers by a local rinting with-an alkalizing agent, thereupo a plying an esterifying aromatic acid chlori e to produce a topical alteration of the locall rinted fiber, t us constituting reserve e ects, then washing subsequently to the esterification, thereu on dyein the reserved parts thus obtain and fina ly efiecting a subsequent dyeing of the unaltered vegetable fibers.

2. A process for reserve dyeing on vegetable fibers, which consists in treating topically the vegetable fibers by a local printing with an alkalizing agent, thereupon applyin an esterifying aromatic sulpho acid ch oride to produce a topical alteration of the locall printed fiber, thusconstituting reserve e ects then washing subsequently to the esterificatlon, thereupon dyeing the reserved parts thus obtained and finally efi'ecting a subsequent dyeing of the unaltered vegetable fibers.

3. A process for reserve dyeing on vegetable fibers, which consists in treating topically the vegetable fibers by a local printing with an alkalizing agent, thereupon applying an esterifying aromatic sulpho acid chloride to produce atopical alteration of the locally printed fiber, thus constituting reserve effects, and subsequently washing after the esterification, thereupon dyein the thus obtained reserved parts with a asic dyestufi and finally effecting a subsequent dyeinlg of the unaltered vegetable fibers.

4. process for reserve dyeing on vegetable fibers, which consists in treating topically the vegetable fibers by a local printing with an alkalizing agent, thereupon applyillilg an esterifying aromatic sulpho acid 0 oride to produce a topical alteration of the locally printed fiber, thus constituting reserve effects, subsequenly washing after the esterification, thereupon dyeing the thus obtained reserved parts and finally effecting a subsequent dyeing of the unaltered vegetable fibers with a substantive dyestufi'.

5. A process for reserve dyeing on vegetable fibers, which consists in treating topicall the vegetable fibers by a local printing wit an alkalizing agent, thereupon applying an esterifying aromatic sulpho acid chloride to produce a topical alteration of the locall printed fiber, thus constituting" reserve e ects, then washing after the esterification, thereupon dyeing the thus obtained reserved arts with a basic dyestufi and finally e acting a subsequent dyeing of the unaltered vegetable fibers with a substantive dyestufi.

6. A process for reserve dyeing on vegetable fibers, which consists in treating topically the vegetable fibers by a local printing with an alkalizing agent, thereu on applying an esterifying aromatic sulp 0 acid chloride to produce a topical alteration of the locall printed fiber, thus constituting reserve e ects, then washin after the ester:- fication thereupon dyeing t e thus obtained reserved parts with a gallocyanine derivative and finally effecting a subse uent dyeing of the unaltered vegetable rs with a substantive dyestufi.

7. A process for reserve dyeing on vegetable fibers which comprises treating pre etermined areas of said fibers with an alkalizing agent, esterifiyin said treated areas with an aromatic aci ch oride, whereby reserve efiects are produced, washing said fibers, d eing said treated areas and finally dyeing t e untreated areas.

8. A process for reserve dyeing on vege table fibers which comprises treating predetermined areas of said fibers with an alkalizing agent, esterifying said treated areas with an aromatic sulpho acid chloride, whereby reserve effects are produced, washing said fibers, dyeing said treated areas and finally dyeing the untreated areas.

9. A rocess for reserve dyeing on vegetable fi rs which comprises treating we determined areas of said fibers with an alkalizing agent, esterifying said treated areas with an aromatic acld chloride, whereby reserve efi'ects areproduced, washing said fibers, dyeing said treated areas with a basic dyestufi and finally dyeing the untreated areas.

10. A process for reserve dyeing on vegetable fibers which comprises treating predetermined areas of said fibers with an alkalizing agent, esterifyin said treated areas with an aromatic sulp 0 acid chloride, whereby reserve effects are produced washing said fibers, dyeing said treate areas with a basic dyestufi and finally dyeing the untreated areas.

In witness whereof we have hereunto signed our names this 10th day of May, 1926.

HANS LEEMANN. GIOVANNI TAGLIANI. 

